Adjustable clamp.



S. COHN.

ADJUSTABLECLAMP.

APPLICATION FILED JUNE7, I918.

Patented Jan. 28, 1919.

fizz e7 w M W M SAMUEL COI-IN, on

NEW YORK, N. Y., ASSIGNOR TOPOLICE TRAFFIC AUTO SIGNAL COMPANY, ACORPORATION OF NEW YORK.

ADJUSTABLE CLAMP.

Original application filed January 31, 1918, Serial No. 214,711.

Specification of Letters Patent.

Patented Jan. 28, 1919.

Divided and this application filed June 7,

1918. Serial No. 238,652.

signaling device in various positions upon the supporting bracket, butit will be apparent that my invention is adapted for many other uses.

The object of my invention is to provide a simple, inexpensive andefficient clamp for holding two members in such relation that they maybe adjusted in their relative positions upon a ball and socketconnection and so that the parts may be easily and securely clamped inany adjusted relation. The construction is much lighter than most of thesolid ball and socket clamps and the principal parts may be stamped fromsheet metal.

In the drawing forming part of this application,

Figure 1 is an end view of a tubular bracket with a body mounted thereonby means of my improved clamp.

Fig. 2 is a plan View thereof, and

Fig. 3 is a sectional view taken on the line 33 of Fig. 1.

In the drawing I have shown a fragment 1 of a box or frame which may bethe article which is to be adjustably supported upon a support such as abracket 2. In the appli cation of which this case is a division thecasing 1 constitutes a box forming part of an automobile signal but itis to be understood that the present device is adapted for other' uses.

The wall 1 has stamped or drawn thereon a spherical socket 3 formingpart of a universal joint for connecting the member 1 with thesupporting bracket 2. The bracket 2 is shown herein as a tube. It is notnecessary that the supporting member be a tube but my present devicemakes it convenient to use a tube where lightness is a desirablefeature. This support 2 has a curved cotter pin 4.. extending through itto form an abutment for a spherical disk or washer 5 which rests againstone surface (the concave surface) of the socket member 3 and conform ingto the curvature of the latter.

There is a washer 6 having a concave surface 7 fitting against theconvex surface of the socket member 3, so that this washer engages thelatter from the opposite side to the washer 5. The washer 6 preferablyhas its rear surface 8 convexed, as shown.

The means for tightening the washers 5, 6 against the socket member 3comprises a bolt 9 which passes through apertures 10 in the tube 2 justbeyond the washer 6. This bolt has wedge or cone shaped members 11arranged in opposite positions and extending partly within the apertures10 in the tube 2; and these wedge shaped members are adapted to beforced toward each other when the bolt 9 is tightened. The cone or wedgeshaped members 11 conform more or less to the convex surface 8 of thewasher 6 and when they are forced toward each other by the tightening ofthe bolt they force the washers 5, 6 and socket 8 tightly against eachother and against the cotter pin 4 and in this manner the universaljoint is clamped in any desired position.

The central aperture 12 of the socket memher is larger than the tube 2in order that the member 1 may be turned at any desired angle inrelation to the bracket. To position the member 1 at any desired angleit is only necessary to loosen the bolt 9 to partially relieve thepressure of the wedge members 11 upon the universal joint. The member 1may then be turned to any desired position; and during this adjustmentthe socket member 3 turns between the Washers 5, 6, whose engagingsurfaces are parallel therewith. The washers themselves remainstationary during this adjustment; that is to say, they do not turn withthe socket mem her 3. When the member 1 is properly positioned the bolt9 is tightened and this forces the wedge members toward each other andthey in turn force the washers and socket members together.

The present device is light and inexpensive and the clamp holds theparts very firm.

Having described my invention what I claim is:

1. A device of the class described comprising a curved socket member, asupport,

members for clamping the socket member between them to hold the socketmember in various angular positions in relation to the support and aWedge device for tightening said socket member and said clampingnlembersagainst each other.

2. A device of the class described comprising a spherical socket memberforming part of a universal joint and provided With an aperture, abracket extending through said aperture, Washers on said bracket adaptedto clamp said socket member between them, cone shaped Wedges projectinginto said bracket and adapted to force said Washers and socket memberstogether and a bolt adapted to move said Wedges toward each other totighten said Washers and socket members.

3. A deviceof the class described comprising a tubular support, aconcavo-convex socket member adapted to be held on said support andhaving an aperture through Which the support projects, of largerdiameter than said support, a curved cotter pin in said support, acurved Washer between the cotter pin and one surface of said socketmember, a curved Washer engaging the 0pposite surface of said socketmember, a bolt passing through said support, and Wedge members adaptedto be drawn toward each other by said bolt and adapted to act on saidlatter Washer to clamp the socket member and Washers.

Signed at the city, county and State of New York, this lath day of May,1918.

SAMUEL COHN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Fatents, Washington, I. G.

